Preparation of propene and, if desired, 1-butene

Details Preparation of propene and, if desired, 1-butene Preparation of propene and, if desired, 1-butene

C - Chemistry, Metallurgy

07

C

C07C 11/08 (2006.01) C07C 6/04 (2006.01) C07C 11/06 (2006.01)

Patent

CA 2260304

Propene and, if desired, 1-butene are prepared by a) reacting 1-butene and 2-butene to give propene and 2-pentene in the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb or VIII of the Periodic Table of the Elements, b) subsequently separating the propene and 2-pentene formed, c) subsequently reacting the 2-pentene with ethene to give propene and 1- butene in the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb or VIII of the Periodic Table of the Elements, d) subsequently separating the propene and 1-butene formed, e) discharging at least some of the 1-butene formed and/or at least partly isomerizing the 1-butene formed to give 2-butene in the presence of an isomerization catalyst and subsequently returning the undischarged 1-butene and the 2-butene formed together with a part of the C4 fraction not reacted in step a) to step a).

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